PCA9512BD: Level shifting hot swappable I²C-bus and SMBus bus buffer

The PCA9512A/B is a hot swappable I²C-bus and SMBus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock buses and includes two dedicated supply voltage pins to provide level shifting between 3.3 V and 5 V systems while maintaining the best noise margin for each voltage level. Either pin may be powered with supply voltages ranging from 2.7 V to 5.5 V with no constraints on which supply voltage is higher. Control circuitry prevents the backplane from being connected to the card until a stop bit or bus idle occurs on the backplane without bus contention on the card. When the connection is made, the PCA9512A/B provides bidirectional buffering, keeping the backplane and card capacitances isolated.

Both the PCA9512A and PCA9512B use identical silicon (PCN201012007F dated 13 Dec 2010), so the PCA9512B will be discontinued in the near future and is not recommended for new designs.

The PCA9512A/B rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements. The PCA9512A/B incorporates a digital input pin that enables and disables the rise time accelerators on all four SDAn and SCLn pins.

During insertion, the PCA9512A/B SDAn and SCLn pins are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

The incremental offset design of the PCA9510A/11A/12A/12B/13A/14A I/O drivers allows them to be connected to another PCA9510A/11A/12A/12B/13A/14A device in series or in parallel and to the I²C compliant side of static offset bus buffers, but not to the static offset side of those bus buffers.

sot096-1_3d

Data Sheets (1)

Name/Description	Modified Date
Level shifting hot swappable I2C-bus and SMBus bus buffer (REV 6.0) PDF (315.0 kB) PCA9512A_PCA9512B	01 Mar 2013

Users Guides (3)

Name/Description	Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204	28 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA	03 Apr 2013
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206	13 Jun 2006

Brochures (1)

Name/Description	Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540	01 Aug 2014

Package Information (1)

Name/Description	Modified Date
plastic small outline package; 8 leads; body width 3.9 mm (REV 1.0) PDF (244.0 kB) SOT96-1	08 Feb 2016

Packing (1)

Name/Description	Modified Date
SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 2.0) PDF (232.0 kB) SOT96-1_118	19 Apr 2013

Supporting Information (3)

Name/Description	Modified Date
Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE	30 Sep 2013
Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW	08 Oct 2009
Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE	08 Oct 2009

Ordering Information

Product	Status	Package version	Application	Enable	Function	Operating Temperature (Cel)	Number of bits	Voltage Translation Range (V)	Operating voltage (VDC)	Operating voltage 2 (V)	Inputs	Outputs	TTL Drive (mA)	GTL Drive (mA)	I2C-bus (kHz)
PCA9512BD	End of Life	SOT96-1				-40~85			2.7~5.5	2.7~5.5	1	1			400

Package Information

Product ID	Package Description	Outline Version	Reflow/Wave Soldering	Packing	Product Status	Part NumberOrdering code(12NC)	Marking	Chemical Content	RoHS / Pb Free / RHF	LeadFree Conversion Date	MSL	MSL LF
PCA9512BD		SOT96-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Discontinued	PCA9512BD,118 (9352 940 04118)	PA9512B	PCA9512BD		Always Pb-free	1	1